Table 2

Number of CT scanners in Gunma prefecture and data collection.

Number of CT scanners

Estimated annual number of patients



Total

Data obtained (%)


Complete data

Scanning protocol & Number of patients *

Mean

Range

Estimated total number


Hospitals

132

63

61

2,571

36 - 23,616

339,393

Clinics

94 **

6

0

1,406

288 - 2,664

132,164


Total

226

69

61

471,557


* No individual patients' data were provided.

** Data requests sent to 14 randomly-selected clinics.

Tsushima et al. BMC Medical Imaging 2010 10:24   doi:10.1186/1471-2342-10-24

Open Data